CN106276979A - A kind of melting furnace for by-product Nacl recycling treatment and method - Google Patents
A kind of melting furnace for by-product Nacl recycling treatment and method Download PDFInfo
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- CN106276979A CN106276979A CN201510238268.3A CN201510238268A CN106276979A CN 106276979 A CN106276979 A CN 106276979A CN 201510238268 A CN201510238268 A CN 201510238268A CN 106276979 A CN106276979 A CN 106276979A
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Abstract
The melting furnace for by-product Nacl recycling treatment of the present invention, including basis, it is characterised by: the melt chamber being provided above being made up of refractory brick on basis, melt chamber be arranged above heat chamber, melt chamber is opened above charging aperture, multiple natural gas spray-head interfaces on top cover, the periphery in heating chamber is provided with exhanst gas outlet, and discharging opening is offered in the periphery of melt chamber.The method of the by-product Nacl recycling treatment of the present invention, including: a). the addition of by-product Nacl；B). the heating of by-product Nacl, utilize natural gas that by-product Nacl is heated to molten condition；C). Organic substance high-temperature oxydation；D). the discharge of gas；E). the outflow of Nacl.The melting furnace of the present invention and processing method, can be converted into refining industrial salt by the by-product Nacl that cannot directly utilize in the past, it is achieved that the recycling of by-product Nacl, and beneficial effect is notable, and using value is high.
Description
Technical field
The present invention relates to a kind of melting furnace for by-product Nacl recycling treatment and method, in particular, particularly relate to a kind of utilize refractory brick to form melt chamber and by the direct-fired melting furnace for by-product Nacl recycling treatment of natural gas and method.
Background technology
By-product Nacl is because of containing a small amount of Organic substance, it is difficult to is effectively addressed and utilizes, it is impossible to directly as the raw material of downstream product.Fixed-end forces center processing can only be stored up or be delivered to by major part manufacturer.The processing cost at fixed-end forces center is up to 3000-4000 unit/t at present, and enterprise is difficult to bear, and mainly uses the processing mode that landfill yard is taked anti-corrosion leak-proof fill after processing again.This processing mode not only land occupation, also it is the significant wastage to resource simultaneously, there is also the potential risk that environment is caused grave danger, once anti-corrosion leak-proof layer leaks, soluble-salt and organic impurities are lost from, salinization surrounding soil, harm vegetation around, periphery water source, subsoil water and farmland are polluted simultaneously.
By-product Nacl is important Elementary Chemical Industry raw material, is also extremely valuable national strategy resource.Along with the high speed development of national economy, in Chemical Manufacture, various by-product Nacl amounts are increasing, to environment structure grave danger.In recent years, resources conservation, eco-friendly understanding are stepped up by people
, government there has also been notable reinforcement in environmental protection legislation and law enforcement dynamics, and in Chemical Manufacture, process and the recycling of by-product Nacl are increasingly subject to pay attention to.
Such as Patent No. CN201310184084.4, the patent of invention file of entitled " extracting method of inorganic salt and the resource utilization method of industrial wastewater in a kind of industrial wastewater ", and Patent No. CN201310299546.7, the patent of invention file of invention entitled " a kind of method reclaiming high purity inorganic salt from phosphorous industrial wastewater ", all disclose the method reclaiming inorganic salt from industrial wastewater, in order to obtain high purity inorganic salt after process through carburising step, to remove the organic impurities in inorganic salt.But when utilizing existing rotary kiln, vertical incinerator, horizontal incinerator, batch-type furnace, fluidized bed furnace, grate incinerator or fluidized bed incinerator that inorganic salt carries out carbonization process, owing to the inorganic salt of molten condition directly contacts with high-temperature kiln wall, " viscous wall " phenomenon can be there is, not only affect the normal carbonization of inorganic salt, but also the service life of equipment can be shortened.
Therefore, utilize suitable technique and equipment this by-product Nacl of recycling as the raw material of industry, be possible not only to eliminate environmental pollution, it is also possible to realize by-product Nacl resource, it is achieved recycling economy.Therefore process and make good use of these by-product Nacls, turn waste into wealth, have highly important realistic meaning, there is good social benefit and environmental benefit, Resources for construction economizing type and environmentally friendly amphitypy society are also had great strategic importance.
Summary of the invention
The present invention is for the shortcoming overcoming above-mentioned technical problem, it is provided that a kind of melting furnace for by-product Nacl recycling treatment and method.
The melting furnace for by-product Nacl recycling treatment of the present invention, including the basis playing fixing and supporting role, it is particular in that: the melt chamber being provided above being made up of refractory brick on described basis, the heating chamber being arranged above being made up of refractory brick of melt chamber, that heats chamber is provided above top cover；The melt chamber charging aperture having for injecting by-product Nacl in melt chamber opened above, multiple natural gas spray-head interface for by-product Nacl being heated to molten condition it is evenly distributed with on top cover, the periphery in heating chamber is provided with is easy to the exhanst gas outlet that the gas that in the Nacl of molten condition, oxidation operation produces is discharged, and the periphery of melt chamber offers to be easy to exceed the discharging opening that the refining industrial salt of the molten condition of certain liquid level flows out automatically.
The melting furnace for by-product Nacl recycling treatment of the present invention, described by-product Nacl is the Nacl of chemical enterprise by-product, including sodium chloride, potassium chloride, magnesium chloride, sodium sulfate, potassium sulfate and magnesium sulfate.
The melting furnace for by-product Nacl recycling treatment of the present invention, the lower section on described basis is provided with base, and described melt chamber, base and top cover are constituted by refractory brick..
The melting furnace for by-product Nacl recycling treatment of the present invention, described refractory brick is silica brick, silicon carbide brick, zircon brick, clay brick, alumina firebrick, corundum refractory brick, magnesia fire-protecting wall or dolomite brick.
The melting furnace for by-product Nacl recycling treatment of the present invention, it is 500 DEG C～1200 DEG C that natural gas is burnt to the heating-up temperature of by-product Nacl in melt chamber by natural gas spray-head interface, preferably 700-900 DEG C.
The melting furnace for by-product Nacl recycling treatment of the present invention, is provided with the conveying auger for by-product Nacl is continuously introduced into melt chamber at described charging aperture.
The melting furnace for by-product Nacl recycling treatment of the present invention, the gas that in the gases such as the carbon dioxide that combustion of natural gas produces and by-product Nacl, Organic substance high-temperature oxydation produces is discharged by exhanst gas outlet, and is used as the combustion air heat exchange of natural gas and the drying and preheating of by-product Nacl.
The melting furnace for by-product Nacl recycling treatment of the present invention, the outer end of described exhanst gas outlet is provided with floss hole.
The present invention utilizes the method that melting furnace carries out by-product Nacl recycling treatment, and it is particular in that, is realized by following steps: a). the addition of by-product Nacl, by-product Nacl is sent in melt chamber by charging aperture；B). the heating of by-product Nacl, the by-product Nacl in melt chamber is heated by the natural gas utilizing natural gas shower nozzle seam to burn, and is heated to molten condition；C). Organic substance high-temperature oxydation, when by-product Nacl is heated to molten condition, Organic substance generation high-temperature oxydation therein and formed gas discharge；D). the gas that in the discharge of gas, the gas such as carbon dioxide that combustion of natural gas produces and by-product Nacl, Organic substance high-temperature oxydation produces is discharged through exhanst gas outlet；E). the outflow of refining industrial salt, after the liquid level of the Nacl of molten condition reach a certain height in melt chamber, flow out via discharging opening, after cooling, make the refining industrial salt of lamellar through microtome.
The present invention utilizes the method that melting furnace carries out by-product Nacl recycling treatment, the high-temperature flue gas discharged through exhanst gas outlet in step d) passes first into secondary reformer and carries out the burning of residual gas, then heat recovery is carried out through waste heat boiler, again combustion air is preheated, then by-product Nacl is dried preheating, expellant gas high air discharge after cyclonic separation and bag-type dust after drying and preheating；In step e), the cooling water flowing through microtome produces low-pressure steam, for utilization.
The invention has the beneficial effects as follows: the melting furnace of the present invention and utilize its method carrying out by-product Nacl recycling treatment, by by-product Nacl is sent in melt chamber, then by the heating of multiple natural gas shower nozzle seam natural gass above heating chamber, effectively by-product Nacl can be heated to molten condition so that the Organic substance generation high-temperature oxydation in by-product Nacl forms gas and discharges；Owing to melt chamber uses refractory brick, and using the natural gas form directly to the heating of by-product Nacl, not only improve and be heated to melt temperature, it also avoid " viscous wall " phenomenon using conventional firing equipment to be caused, beneficial effect is notable.
Meanwhile, the high-temperature gas by being discharged by exhanst gas outlet is dried use as natural gas preheating and by-product Nacl, it is achieved that making full use of of heat, beneficially energy conservation.By the re-using to the steam that microtome cooling water produces, further save the energy.
The melting furnace of the present invention and the method for by-product Nacl recycling treatment, can will be converted into refining industrial salt by the by-product Nacl of landfill disposal in the past, the soil that is likely to result in when avoiding conventional landfill disposal, water pollution, achieve and turn waste into wealth, decrease material cycling link, save processing cost；Overall construction design is reasonable and compact, and treatment effect is preferable, and beneficial effect is notable, it is simple to application.
Accompanying drawing explanation
Fig. 1 is the front view of the melting furnace for by-product Nacl recycling treatment of the present invention；
Fig. 2 is the top view of the melting furnace for by-product Nacl recycling treatment of the present invention；
Fig. 3 is the left view of the melting furnace for by-product Nacl recycling treatment of the present invention；
Fig. 4 is that the melting furnace that utilizes of the present invention carries out the schematic diagram of by-product Nacl recycling processing method.
In figure: 1 basis, 2 melt chamber, 3 heating chambeies, 4,5 refractory brick, 6 charging apertures, 7 natural gas spray-head interfaces, 8 discharging openings, 9 exhanst gas outlets, 10 top covers, 11 bases, 12 floss holes.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, Figure 2 and Figure 3, sets forth the front view of melting furnace, top view and the left view for by-product Nacl recycling treatment of the present invention, it includes basis 1, melt chamber 2, heating chamber 3, charging aperture 6, natural gas spray-head interface 7, discharging opening 8, exhanst gas outlet 9, top cover 10, base 11, floss hole 12；Shown basis 1 is arranged on base 11, and melt chamber 2 is positioned at the top on basis 1, and base 11 realizes the fixing of basis 1 and supporting role.Melt chamber 2 is made up of refractory brick 4, both can bear the high temperature under by-product Nacl molten condition, can avoid again the generation of " viscous wall " phenomenon.Shown in melt chamber 2 be arranged above heat chamber 3, use refractory brick 5 constitute.
That heats chamber 3 is arranged above top cover 10, and natural gas spray-head interface 7 is uniformly opened on top cover 10.Charging aperture 6 is positioned at the top of melt chamber 2, by-product Nacl is injected will pass through charging aperture 6 in melt chamber 2, natural gas burns in the heating chamber 3 below natural gas spray-head interface 7, so that the by-product Nacl in melt chamber 2 is heated, by-product Nacl can be heated to 500 DEG C～1200 DEG C, it is made to be become molten state from solid-state, in order to the Organic substance generation high-temperature oxydation in Nacl is converted into gas, it is achieved organic removal in Nacl.
Discharging opening 8 is provided in the other end that charging aperture 6 is relative, when the liquid level of the Nacl of molten condition reach a certain height, can be flowed out by discharging opening 8, the Nacl of the molten state of outflow is cooled and after microtome, form the refining industrial salt of lamellar, be available for re-using.Shown exhanst gas outlet 9 is arranged at the periphery in heating chamber 3, the gas that in the gases such as the carbon dioxide that combustion of natural gas produces and molten condition Nacl, oxidation operation produces is discharged through exhanst gas outlet 9, the energy entrained by high-temperature flue gas that exhanst gas outlet 9 is discharged is available for re-using, as being used as the combustion air heat exchange of natural gas and the drying and preheating of by-product Nacl.It is provided with floss hole 12, in order to the flue dust discharged through exhanst gas outlet 9 is cleared up at shown exhanst gas outlet 9.
Wherein, conveying auger can be set at charging aperture 6, in order to be continuously introduced into melt chamber 2 by by-product Nacl.The quantity of the natural gas spray-head interface 7 arranged on top cover 10 is chosen as 4, to realize the uniform heating of by-product Nacl in melt chamber 2.
As shown in Figure 4, the melting furnace that utilizes giving the present invention carries out the schematic diagram of by-product Nacl recycling processing method, and the embodiment below in conjunction with byproduct sodium chloride and by-product potassium chloride further illustrates:
1. melting furnace recycling treatment byproduct sodium chloride
A). the addition of byproduct sodium chloride, byproduct sodium chloride is sent in melt chamber 2 by charging aperture 6；
In this step, byproduct sodium chloride is entered from charging aperture 6 by conveying auger, and inlet amount is chosen as about 100kg/h.
B). the heating of byproduct sodium chloride, utilize the natural gas of burning at natural gas spray-head interface 7 that the byproduct sodium chloride in melt chamber 2 is heated, holding furnace cavity temperature is 850-900 DEG C, is heated to molten condition；
In this step, natural gas is sprayed into by natural gas spray-head interface 7, and the quantity of natural gas spray-head interface is 4, and straying quatity is chosen as about 6 cubic metres per hour.
C). Organic substance high-temperature oxydation, when byproduct sodium chloride is heated to molten condition, Organic substance generation high-temperature oxydation therein and formed gas discharge；
In this step, under the heating of natural gas, the byproduct sodium chloride in melting furnace is become molten state, Organic substance Mr.'s high-temperature oxydation gas, it is achieved organic removal from solid-state.
D). the gas that in the discharge of gas, the gas such as carbon dioxide that combustion of natural gas produces and byproduct sodium chloride, Organic substance high-temperature oxydation produces is discharged through exhanst gas outlet (9)；
In this step, in order to realize making full use of heat entrained by the high-temperature flue gas discharged through exhanst gas outlet 9, the high-temperature flue gas discharged through exhanst gas outlet 9 passes first into secondary reformer and carries out the burning of residual gas, then heat recovery is carried out through waste heat boiler, again combustion air is preheated, then byproduct sodium chloride is dried preheating, expellant gas high air discharge after cyclonic separation and bag-type dust after drying and preheating.
E). the outflow of sodium chloride, after the liquid level of the sodium chloride of molten condition reach a certain height in melt chamber 2, flow out via discharging opening 8, after cooling, make the refined sodium chloride of lamellar through microtome.
In this step, the cooling water flowing through microtome produces low-pressure steam, for utilization.
As shown in table 1, give and utilize the related chemistry index of the refined sodium chloride acquired in the melting furnace of the present invention and byproduct sodium chloride recycling processing method:
Table 1
Visible by table 1, the refined sodium chloride acquired in the method for the present invention reaches and has surmounted the top grade index of refining industrial salt of national regulations.
2. melting furnace recycling treatment by-product potassium chloride
A). the addition of by-product potassium chloride, by-product potassium chloride is sent in melt chamber 2 by charging aperture 6；
In this step, by-product potassium chloride is entered from charging aperture 6 by conveying auger, and inlet amount elects about 120kg/h as.
B). the heating of by-product potassium chloride, utilize the natural gas of burning at natural gas spray-head interface 7 that the by-product potassium chloride in melt chamber 2 is heated, holding furnace cavity temperature is 800-850 DEG C, is heated to molten condition；
In this step, natural gas is sprayed into by natural gas spray-head interface 7, and the quantity of natural gas spray-head interface is 3, and straying quatity is chosen as about 5.4 cubic metres per hour.
C). Organic substance high-temperature oxydation, when by-product potassium chloride is heated to molten condition, Organic substance generation high-temperature oxydation therein and formed gas discharge；
In this step, under the heating of natural gas, the by-product potassium chloride in melting furnace is become molten state, Organic substance Mr.'s high-temperature oxydation gas, it is achieved organic removal from solid-state.
D). the gas that in the discharge of gas, the gas such as carbon dioxide that combustion of natural gas produces and by-product potassium chloride, Organic substance high-temperature oxydation produces is discharged through exhanst gas outlet (9)；
In this step, in order to realize making full use of heat entrained by the high-temperature flue gas discharged through exhanst gas outlet 9, the high-temperature flue gas discharged through exhanst gas outlet 9 passes first into secondary reformer and carries out the burning of residual gas, then heat recovery is carried out through waste heat boiler, again combustion air is preheated, then by-product potassium chloride is dried preheating, expellant gas high air discharge after cyclonic separation and bag-type dust after drying and preheating.
E). the outflow of potassium chloride, after the liquid level of the potassium chloride of molten condition reach a certain height in melt chamber 2, flow out via discharging opening 8, after cooling, make the refined potassium chloride of lamellar through microtome.
In this step, the cooling water flowing through microtome produces low-pressure steam, for utilization.
As shown in table 2, give and utilize the related chemistry index of the refined potassium chloride acquired in the melting furnace of the present invention and by-product potassium chloride recycling processing method:
Table 2
Visible by table 2, the refined potassium chloride acquired in the method for the present invention reaches and has surmounted the top grade index of refining industrial salt of national regulations.
The melting furnace of the present invention and utilize its method carrying out by-product Nacl recycling treatment, reach organic purpose in removing by-product Nacl, obtain the refining industrial salt of high-quality, it is achieved that the recycling of by-product Nacl, there is the highest using value.
Claims (10)
1. the melting furnace for by-product Nacl recycling treatment, including the basis (1) playing fixing and supporting role, it is characterized in that: the melt chamber (2) being provided above being made up of refractory brick (4) on described basis, the heating chamber (3) being arranged above being made up of refractory brick (5) of melt chamber, that heats chamber is provided above top cover (10)；The melt chamber charging aperture (6) having for injecting by-product Nacl in melt chamber opened above, multiple natural gas spray-head interface (7) for by-product Nacl being heated to molten condition it is evenly distributed with on top cover, the periphery in heating chamber is provided with is easy to the exhanst gas outlet (9) that the gas that in the Nacl of molten condition, oxidation operation produces is discharged, and the periphery of melt chamber offers to be easy to exceed the discharging opening (8) that the refining industrial salt of the molten condition of certain liquid level flows out automatically.
Melting furnace for by-product Nacl recycling treatment the most according to claim 1, it is characterised in that: described by-product Nacl is the Nacl of chemical enterprise by-product, including sodium chloride, potassium chloride, magnesium chloride, sodium sulfate, potassium sulfate and magnesium sulfate.
Melting furnace for by-product Nacl recycling treatment the most according to claim 1, it is characterised in that: described melt chamber (2), base (11) and top cover (10) are constituted by refractory brick.
Refractory brick the most according to claim 3, it is characterised in that: described refractory brick is silica brick, silicon carbide brick, zircon brick, clay brick, alumina firebrick, corundum refractory brick, magnesia fire-protecting wall or dolomite brick.
Melting furnace for by-product Nacl recycling treatment the most according to claim 1 and 2, it is characterized in that: it is 500 DEG C～1200 DEG C that natural gas is burnt to the heating-up temperature of by-product Nacl in melt chamber (2) by natural gas spray-head interface (7), preferably 700-900 DEG C.
Melting furnace for by-product Nacl recycling treatment the most according to claim 1 and 2, it is characterised in that: described charging aperture (6) place is provided with the conveying auger for by-product Nacl is continuously introduced into melt chamber (2).
Melting furnace for by-product Nacl recycling treatment the most according to claim 1 and 2, it is characterized in that: the gas that in the gases such as the carbon dioxide that combustion of natural gas produces and by-product Nacl, Organic substance high-temperature oxydation produces is discharged by exhanst gas outlet (9), and is used as the combustion air heat exchange of natural gas and the drying and preheating of by-product Nacl.
Melting furnace for by-product Nacl recycling treatment the most according to claim 1 and 2, it is characterised in that: the outer end of described exhanst gas outlet (9) is provided with floss hole (12).
9. the method that the melting furnace utilized described in claim 1 carries out by-product Nacl recycling treatment, it is characterised in that realized by following steps:
A). the addition of Nacl, by-product Nacl is sent in melt chamber (2) by charging aperture (6)；
B). the heating of Nacl, the by-product Nacl in melt chamber (2) is heated by the natural gas utilizing natural gas spray-head interface (7) place to burn, and is heated to molten condition；
C). Organic substance high-temperature oxydation, when by-product Nacl is heated to molten condition, Organic substance generation high-temperature oxydation in Nacl and form gas and discharge；
D). the gas that in the discharge of gas, the gas such as carbon dioxide that combustion of natural gas produces and by-product Nacl, Organic substance high-temperature oxydation produces is discharged through exhanst gas outlet (9)；
E). the outflow of Nacl, after the liquid level of the Nacl of molten condition reach a certain height in melt chamber (2), flow out via discharging opening (8), after cooling, make the refining industrial salt of lamellar through microtome.
Melting furnace the most according to claim 7 carries out the method for by-product Nacl recycling treatment, it is characterized in that: the high-temperature flue gas discharged through exhanst gas outlet (9) in step d) passes first into secondary reformer and carries out the burning of residual gas, then heat recovery is carried out through waste heat boiler, again combustion air is preheated, then by-product Nacl is dried preheating, expellant gas high air discharge after cyclonic separation and bag-type dust after drying and preheating；In step e), the cooling water flowing through microtome produces low-pressure steam, for utilization.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726851A (en) * | 2017-11-07 | 2018-02-23 | 重庆恒瑞窑炉工程有限公司 | A kind of stove and method that the useless danger sodium chloride of chemical industry is converted into refining industrial salt |
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| JPS6284217A (en) * | 1985-10-08 | 1987-04-17 | Agency Of Ind Science & Technol | Glass melting furnace |
| CN1789813A (en) * | 2004-12-15 | 2006-06-21 | 中国科学院工程热物理研究所 | Method and apparatus for treating contaminated salt |
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Application publication date: 20170104 |